US5305614A - Ancillary heat pump apparatus for producing domestic hot water - Google Patents

Ancillary heat pump apparatus for producing domestic hot water Download PDF

Info

Publication number
US5305614A
US5305614A US08/020,166 US2016693A US5305614A US 5305614 A US5305614 A US 5305614A US 2016693 A US2016693 A US 2016693A US 5305614 A US5305614 A US 5305614A
Authority
US
United States
Prior art keywords
heat
heat exchanger
heat pump
circuit
hot water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/020,166
Other languages
English (en)
Inventor
Theodore C. Gilles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lennox Manufacturing Inc
Original Assignee
Lennox Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lennox Industries Inc filed Critical Lennox Industries Inc
Priority to US08/020,166 priority Critical patent/US5305614A/en
Application granted granted Critical
Publication of US5305614A publication Critical patent/US5305614A/en
Assigned to LENNOX MANUFACTURING INC. reassignment LENNOX MANUFACTURING INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LENNOX INDUSTRIES, INC.
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps

Definitions

  • the present invention relates in general to new, improved and more efficient apparatus for producing domestic hot water (hereinafter sometimes "DHW”), and more particularly to an ancillary heat pump (hereinafter sometimes "AHP”) system for such purpose.
  • DHW domestic hot water
  • AHP ancillary heat pump
  • the ancillary heat pump apparatus of the present invention for producing domestic hot water generally includes a domestic hot water heat pump having refrigerant and water circuits which are operatively disposed at the proximal ends thereof into close array at the heat exchanger of the domestic hot water heat pump.
  • the refrigerant circuit of the domestic hot water heat pump hereof has a heat exchanger coil disposed at the distal end thereof, and the water circuit is connected at the distal end thereof to a hot water heater.
  • the distal refrigerant circuit heat exchanger coil is disposed into operative heat exchanging position, directly or indirectly, with respect to a return fluid stream of a heat source.
  • the heat source may be selected from the group consisting of (a) a space conditioning air stream heat pump, (b) a heating and air conditioning system, and (c) a hydronic distribution HVAC system. Other forms of a heat source may likewise be utilized.
  • the above described inventive structure of the ancillary heat pump apparatus of the present invention for producing domestic hot water includes, inter alia, the following desirable features:
  • TES space conditioning thermal energy storage
  • Hot water is supplied in the heating season with a COP of 1.70 or higher.
  • Hot water can supplied during mild seasons, without either heating or cooling demands, with a COP of 1.50 to 1.90.
  • the typical gas-fired water heater recovery efficiency of the prior art is in the range of 76 to 82%, while pilot and off-cycle vent losses reduce the annual efficiency to 65% or less.
  • the annual difference of $146 between the direct element electric system and the combined direct hot water with associated ancillary heat pump (AHP) of the present invention would permit the expenditure of $876 additional installed cost (calculated at 10 year, 20% ROI) for the combined hot water heating system.
  • the apparatus of the present invention provides a primary energy efficiency and cost effective competitive system which is highly beneficial to consumers and to the electric utilities. These estimates are conservative estimates since a COP of 1.75 has been used. However, an hour-by-hour annual analysis could result in a COP of up to 2.0 for most locations in the United States. Since the apparatus of the present invention will have no water heater gas pilot or off-cycle vent losses, it will improve the overall efficiency of a dwelling that uses gas for space heating, while providing "free" hot water from the air conditioning system.
  • the additional heat exchanger coil as used herein may require an air filter, but because it is a "dry" coil and may be designed with wide fin spacing (i.e., 8 fpi), such a filter may not be necessary in these embodiments.
  • the structure of the present invention can in certain embodiments be optimized as either a full cross-section or partial cross-section, with a bypass configuration to be installed anywhere on the return air side (including exhaust air stream or other unconditioned air stream) of any air conditioning system, whether installed in connection with a split system heat pump, furnace and air conditioner or rooftop single package unit.
  • FIG. 1 is a schematic diagram of the ancillary heat pump apparatus of the present invention for production of domestic hot water, primarily for use as an indoor module, and illustrates a return fluid heat exchanger coil disposed at the distal end of the refrigeration circuit thereof and a conventional water heater disposed at the distal end of the water circuit thereof, and further shows a compressor and water circulating pump as a part of said heat pump; and
  • FIG. 2 is a schematic diagram showing an alternative embodiment, primarily for use as an outdoor module, and thus for use with a non-halocarbon, particularly a non-chloro-or fluoro-carbon, and perhaps flammable refrigerant, such as propane (rather than the typically used inflammable refrigerant such as R-22 or other hydrocarbon compounds), and showing the flammable refrigerant as disposed outside the occupied structure, and further showing two supplemental freeze resistant solution fluid circuits (such as glycol or potassium acetate with water) to communicate between the outdoor refrigeration module and the potable water heat exchanger, and thereby with the return fluid heat exchanger disposed within the occupied structure.
  • a non-halocarbon particularly a non-chloro-or fluoro-carbon
  • flammable refrigerant such as propane (rather than the typically used inflammable refrigerant such as R-22 or other hydrocarbon compounds)
  • two supplemental freeze resistant solution fluid circuits such as glycol or potassium acetate with water
  • the apparatus of the present invention for producing domestic hot water includes a heat pump dedicated to producing domestic hot water.
  • This domestic hot water heat pump has a refrigerant circuit and a water circuit, which are each operatively disposed at the proximal ends thereof into mutual close array at the heat exchanger element of the domestic hot water heat pump.
  • Each of the refrigerant circuit and the water circuit respectively includes influent and effluent portions.
  • the refrigerant circuit has a heat exchanger coil at the distal end thereof.
  • the water circuit is connected at the distal end thereof to a hot water storage tank, which may be conventional hot water heater.
  • the distal refrigerant circuit heat exchanger coil is disposed into operative heat exchanging position within a return fluid stream of a heat source.
  • the heat source may be of several different types, and may be preferably selected from group consisting of (a) a space conditioning air stream heat pump, (b) a heating and air conditioning system, and (c) a hydronic distribution HVAC system, of known types.
  • the domestic hot water heat pump may more particularly include a compressor disposed on and downstream of the proximal end of the refrigerant circuit on the influent portion of the refrigerant circuit.
  • the domestic hot water heat pump may further particularly include a water circulating pump disposed upstream of the proximal end of the water circuit and on the influent portion of the water circuit.
  • the fluid stream of the heat source utilized in association with the present invention may be, in preferred embodiments, a liquid circuit of a hydronic distribution HVAC system, or may constitute a heat source selected from the group consisting of (a) an airstream of a space conditioning heat pump, and (b) a heating and air conditioning system.
  • a dedicated heat source exchanger may be further provided.
  • the domestic hot water heat pump utilized in association with the present invention is disposed indoors, in some preferred embodiments.
  • the return fluid stream comprises the unconditioned air stream returning to the space conditioning heat source.
  • the apparatus for producing domestic hot water of the present invention may also include in other preferred embodiments the disposition of the distal intermediary fluid circuit heat exchanger coil to receive heat indirectly from the heat source.
  • a supplemental heat exchanger means may be provided for operative intermediary heat exchange between the domestic hot water heat pump and the hot water storage tank.
  • a supplemental hot water heat exchanger means may be disposed inside a building enclosure, and the heat pump may be disposed outside of the building enclosure. Such a structure finds special utility in embodiments wherein propane is utilized.
  • propane as a refrigerant, and in some embodiments in connection with glycol, as an intermediary fluid, permits material avoidance of the use of chloro-or fluoro-carbons, and is thus desirable based upon present perceptions of environmental damage believed to be caused by chloro-or fluoro-carbons.
  • the heat exchanger means may comprise at least an upstream and a downstream heat exchanger, each of which includes heat input and heat output heat exchange coils.
  • the downstream exchanger heat input coil is connected to a direct heat exchange coil disposed directly within the return fluid stream of the heat source.
  • the heat output coil of the downstream heat exchanger and the heat input coil of the upstream heat exchanger preferably contain a refrigerant which is substantially free of chloro-or fluoro-carbons.
  • This refrigerant may comprise propane in preferred embodiments.
  • each of the direct heat exchanger coil and the refrigerant effluent line of the supplemental heat exchanger may likewise contain a intermediary fluid which is substantially free of chloro-or fluoro-carbons. This intermediary fluid may preferably comprise glycol.
  • FIGS. 1 and 2 of the drawing of the present application depicting an illustrative embodiment suitable for indoor use and FIG. 2 depicting an illustrative embodiment for outdoor use.
  • the apparatus generally 10 of the present invention for producing domestic hot water includes a heat pump 12 dedicated to producing domestic hot water.
  • Domestic hot water heat pump 12 has a refrigerant circuit 14 comprising refrigerant effluent line 16 with refrigerant expansion device 17 and refrigerant influent line 18, and a water circuit 20 comprising hot water effluent line 22 and cold water influent line 24, which are each operatively disposed at the proximal ends 26,28 thereof into mutual close array at the heat exchanger element 30 of domestic hot water heat pump 12.
  • Refrigerant circuit 14 has a heat exchanger coil 32 at the distal end 34 thereof.
  • Water circuit 20 is connected at the distal end 36 thereof to a hot water storage tank 38, which may be a conventional hot water heater.
  • a hot water storage tank 38 which may be a conventional hot water heater.
  • Suitable conventional valving, such as globe valves 40,42, and temperature pressure relief valve 44, water regulating valve 45, and other valves may be provided in connection with hot water heater 38.
  • Distal refrigerant circuit heat exchanger coil 32 is disposed into operative heat exchanging position within a return fluid stream of a heat source (not shown).
  • the heat source may be of several different types, and may be preferably selected from group consisting of (a) a space conditioning air stream heat pump, (b) a heating and air conditioning system, and (c) a hydronic distribution HVAC system, of known types.
  • Domestic hot water heat pump 12 may more particularly include a compressor 46 disposed on and downstream of the proximal end 48 of the refrigerant circuit on refrigerant influent line 18 of the refrigerant circuit 14.
  • Domestic hot water heat pump 12 may further particularly include a water circulating pump 49 disposed upstream of the proximal end 50 of water circuit 20 and on the influent line 24 of water circuit 20.
  • the apparatus generally 110 for producing domestic hot water of the present invention may also include in preferred embodiments the disposition of the distal intermediary fluid circuit heat exchanger coil 132 to receive heat indirectly from a heat source.
  • a supplemental heat exchanger means generally 152 may be provided for operative intermediary heat exchange between the domestic hot water heat pump and hot water storage tank 138.
  • domestic hot water heat pump 112 may be disposed outside a building enclosure and supplemental heat exchanger 152 may be disposed inside of the building enclosure.
  • propane is utilized.
  • propane as a refrigerant, and some embodiments in connection with glycol, permits the material avoidance of the use of chloro-or fluoro-carbons, and is desirable based upon present perceptions of environmental damage caused by chloro-or fluoro-carbons, or other halocarbons.
  • domestic hot water heat pump 112 comprises at least upstream and a downstream heat exchangers 154,156, which respectively include heat input exchange coils 158,160 and heat output heat exchange coils 162, 164.
  • Domestic hot water heat pump 112 includes a compressor 159 with refrigerant expansion device 117 connecting heat exchangers 154,156, as well as a circulating pump 161, of known construction and functionality.
  • Downstream exchanger heat input coil 158 is connected by means of heat transfer fluid influent and effluent lines 165,167 to direct heat exchange coil 132 disposed directly within the return fluid stream (not shown) of the heat source.
  • Heat output coil 162 of downstream heat exchanger 154 and the heat input coil 160 of upstream heat exchanger 156 contain an intermediary refrigerant which is substantially free of chloro-or fluoro-carbons, and which refrigerant may comprise propane in preferred embodiments.
  • each of domestic hot water heat pump 112 and direct heat exchanger coil 126 may contain a heat transfer fluid which is substantially free of chloro-or fluoro-carbons. This heat transfer fluid may preferably comprise glycol.
  • Alternative embodiments of the present invention utilize a liquid hydronic circulating loop, which operates according to known methodology in various operational scenarios of hydronic HVAC systems embodiments, and in particular in at least the following modes:
  • hydronic HVAC systems air ducts are replaced by hydronic lines.
  • water-to-water heat exchange may be utilized.
  • the refrigerant utilized may comprise a wide variety of refrigerant materials.
  • One of the advantages of the improved heat pump water heater structure of the present invention is the superior theoretical source energy efficiency thereof. Utilization of the structure of the present invention has been shown to increase energy efficiency in the production of domestic hot water in connection with a variety of different forms of primary residential heating equipment. Table B, infra, and the sample calculations related thereto show that a conventional gas-fired domestic hot water heater has an annual efficiency of about 62% (1992 Federal Minimum Efficiency). If a desuperheater heat reclaim unit were to be used with the summer air conditioning unit, the annual primary source energy efficiency would be 92.1%. Those systems, however, have application limited to essentially tropical regions due to the risk of freezing up the potable water lines in the winter.
  • the heat pump water heater of the present invention with 78% or 95% AFUE gas-fired furnaces in a home and with various electric utility generating heat rates has primary (source) energy efficiencies ranging between 86.2 and 99.6%, as calculated below.
  • the annual efficiency of the heat pump water heater hereof in homes using a separate heat pump for space heating will be in the range of 85.3 to 92.5%, as calculated below.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Other Air-Conditioning Systems (AREA)
US08/020,166 1991-10-30 1993-02-19 Ancillary heat pump apparatus for producing domestic hot water Expired - Fee Related US5305614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/020,166 US5305614A (en) 1991-10-30 1993-02-19 Ancillary heat pump apparatus for producing domestic hot water

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US78504991A 1991-10-30 1991-10-30
US08/020,166 US5305614A (en) 1991-10-30 1993-02-19 Ancillary heat pump apparatus for producing domestic hot water

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US78504991A Continuation 1991-10-30 1991-10-30

Publications (1)

Publication Number Publication Date
US5305614A true US5305614A (en) 1994-04-26

Family

ID=25134308

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/020,166 Expired - Fee Related US5305614A (en) 1991-10-30 1993-02-19 Ancillary heat pump apparatus for producing domestic hot water

Country Status (6)

Country Link
US (1) US5305614A (ja)
EP (1) EP0609395A1 (ja)
JP (1) JPH07504966A (ja)
AU (1) AU667493B2 (ja)
CA (1) CA2121794A1 (ja)
WO (1) WO1993009386A1 (ja)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5473907A (en) * 1994-11-22 1995-12-12 Briggs; Floyd Heat pump with supplementary heat
US5802864A (en) * 1997-04-01 1998-09-08 Peregrine Industries, Inc. Heat transfer system
US5806331A (en) * 1995-08-07 1998-09-15 Waterfurnace International, Inc. Water-based hot water heat pump
US5947373A (en) * 1996-02-09 1999-09-07 Sanyo Electric Co., Ltd. Refrigerant circuit with fluid heated refrigerant
US5984198A (en) * 1997-06-09 1999-11-16 Lennox Manufacturing Inc. Heat pump apparatus for heating liquid
US20040089003A1 (en) * 2000-05-15 2004-05-13 Manuel Amaral Temperature control method and device in a motor vehichle passenger compartment
US20060162720A1 (en) * 2005-01-24 2006-07-27 Air Hydronic Product Solutions, Inc. Solar and heat pump powered electric forced hot air hydronic furnace
US20070039341A1 (en) * 2005-08-17 2007-02-22 Bradford White Corporation Heat pump water heater
US20070199337A1 (en) * 2006-02-27 2007-08-30 Sanyo Electric Co., Ltd. Refrigeration cycle device
US20070227529A1 (en) * 2006-03-29 2007-10-04 Fafco, Inc. Kit for solar water heating system
US20080184724A1 (en) * 2007-02-01 2008-08-07 Tadeusz Frank Jagusztyn Heat Transfer System and Associated Methods
US20080202125A1 (en) * 2007-02-26 2008-08-28 Unico, Inc. Packaged Small-Duct, High-Velocity Air Conditioner and Heat Pump Apparatus
US20080210177A1 (en) * 2007-03-01 2008-09-04 Rheem Manufacturing Company Dual fuel air conditioning circuit-based water heater
US20100101506A1 (en) * 2007-03-27 2010-04-29 Syuuji Furui Heat pump type hot water supply apparatus and heating and hot water supply apparatus
US20100126705A1 (en) * 2007-03-30 2010-05-27 Syuuji Furui Heating and hot water supply apparatus
US20100242950A1 (en) * 2007-03-05 2010-09-30 Taco, Inc. Solar Heating Systems
US20130025309A1 (en) * 2011-07-27 2013-01-31 Shih-Kun Huang Energy-saving hot water-heating device and system applicable to the same
US8385729B2 (en) 2009-09-08 2013-02-26 Rheem Manufacturing Company Heat pump water heater and associated control system
US20130186122A1 (en) * 2011-07-25 2013-07-25 David Hamilton Hot Water Heater Pre-Heating Apparatus
US20130219945A1 (en) * 2010-12-22 2013-08-29 Mitsubishi Electric Corporation Combined hot water supply and air-conditioning device
US20130336642A1 (en) * 2011-03-11 2013-12-19 Carrier Corporation Rooftop unit
US20140260380A1 (en) * 2013-03-15 2014-09-18 Energy Recovery Systems Inc. Compressor control for heat transfer system
US9016074B2 (en) 2013-03-15 2015-04-28 Energy Recovery Systems Inc. Energy exchange system and method
US9234686B2 (en) 2013-03-15 2016-01-12 Energy Recovery Systems Inc. User control interface for heat transfer system
US9581340B2 (en) 2012-11-16 2017-02-28 Billybob Corporation Domestic hot water delivery system
US9822996B2 (en) 2014-12-01 2017-11-21 David Deng Additive heat unit for HVAC heat pump system
US10260775B2 (en) 2013-03-15 2019-04-16 Green Matters Technologies Inc. Retrofit hot water system and method
US20190346187A1 (en) * 2018-05-11 2019-11-14 Mitsubishi Electric Us, Inc. System and method for providing supplemental heat to a refrigerant in an air-conditioner
WO2022040047A1 (en) * 2020-08-17 2022-02-24 Hunt Utilities Group Llc System and method for hydronic distribution with submersible pumps in an unpressurized tank
US20230136851A1 (en) * 2021-11-03 2023-05-04 Lunar Energy, Inc. Retrofit hot water heat pump

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2719891B1 (fr) * 1994-05-13 1996-06-14 Christian Gruson Générateur pour eau chaude sanitaire avec récupération de chaleur sur un système de climatisation.
JP2010065852A (ja) * 2008-09-08 2010-03-25 Showa Mfg Co Ltd 給湯装置及び、その耐圧熱交換ユニット
CN103868124B (zh) * 2014-03-01 2016-04-13 双良节能系统股份有限公司 两路水同时供热的补燃型溴化锂吸收式换热系统
CN103868131B (zh) * 2014-03-01 2016-08-17 双良节能系统股份有限公司 补燃型溴化锂吸收式换热系统
JP6109119B2 (ja) * 2014-07-10 2017-04-05 三菱電機株式会社 ヒートポンプ給湯システム
US10890359B2 (en) * 2016-07-26 2021-01-12 Noritz Corporation Heating and hot water supply device
US20210341186A1 (en) * 2018-11-16 2021-11-04 Mitsubishi Electric Corporation Plate-type heat exchanger, heat pump device, and heat-pump-type cooling and heating hot-water supply system

Citations (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2312735A1 (fr) * 1975-05-30 1976-12-24 Munich Bernard Pompe a chaleur pour eau chaude domestique
US4151721A (en) * 1977-09-09 1979-05-01 Kumm Emerson L Solar powered air conditioning system employing hydroxide water solution
US4173872A (en) * 1978-02-01 1979-11-13 Energy Utilization Systems, Inc. Water heater apparatus
US4194368A (en) * 1976-10-04 1980-03-25 Borg-Warner Corporation Combination split system air conditioner and compression cycle domestic hot water heating apparatus
WO1981003219A1 (en) * 1980-04-30 1981-11-12 Elektro Standard Device for the recovery of heat
US4316502A (en) * 1980-11-03 1982-02-23 E-Tech, Inc. Helically flighted heat exchanger
US4330309A (en) * 1979-06-18 1982-05-18 Robinson Jr Glen P Heat pump water heater
US4363218A (en) * 1981-04-10 1982-12-14 Halstead Industries, Inc. Heat pump using solar and outdoor air heat sources
US4391104A (en) * 1982-01-15 1983-07-05 The Trane Company Cascade heat pump for heating water and for cooling or heating a comfort zone
US4399664A (en) * 1981-12-07 1983-08-23 The Trane Company Heat pump water heater circuit
US4434539A (en) * 1980-11-03 1984-03-06 E-Tech, Inc. Method of manufacturing a heat exchanger
US4448037A (en) * 1982-01-29 1984-05-15 Mitsubishi Denki Kabushiki Kaisha Combined air conditioning and hot water service system
US4474018A (en) * 1982-05-06 1984-10-02 Arthur D. Little, Inc. Heat pump system for production of domestic hot water
US4528822A (en) * 1984-09-07 1985-07-16 American-Standard Inc. Heat pump refrigeration circuit with liquid heating capability
US4575001A (en) * 1983-10-11 1986-03-11 Cantherm Heating Ltd. Heat pump system
US4598557A (en) * 1985-09-27 1986-07-08 Southern Company Services, Inc. Integrated heat pump water heater
US4665712A (en) * 1985-12-10 1987-05-19 Dec International, Inc. Heat pump water heater system
US4685307A (en) * 1984-07-27 1987-08-11 Uhr Corporation Residential heating, cooling and energy management system
US4776180A (en) * 1986-05-22 1988-10-11 Mississippi Power Company Updraft integrated heat pump
US4796437A (en) * 1987-10-23 1989-01-10 James Larry S Multifluid heat pump system
US4856578A (en) * 1988-04-26 1989-08-15 Nepco, Inc. Multi-function self-contained heat pump system
US4893476A (en) * 1988-08-12 1990-01-16 Phenix Heat Pump Systems, Inc. Three function heat pump system with one way receiver
US4911741A (en) * 1988-09-23 1990-03-27 Davis Robert N Natural gas liquefaction process using low level high level and absorption refrigeration cycles
US4955930A (en) * 1989-07-21 1990-09-11 Robinson Jr Glen P Variable water flow control for heat pump water heaters
US4955207A (en) * 1989-09-26 1990-09-11 Mink Clark B Combination hot water heater-refrigeration assembly
US4959975A (en) * 1987-05-14 1990-10-02 Conserve, Inc. Heat pump system
US5081848A (en) * 1990-11-07 1992-01-21 Rawlings John P Ground source air conditioning system comprising a conduit array for de-icing a nearby surface

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4314456A (en) * 1980-05-05 1982-02-09 Borg-Warner Corporation Refrigerant condensing system
US4693089A (en) * 1986-03-27 1987-09-15 Phenix Heat Pump Systems, Inc. Three function heat pump system

Patent Citations (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2312735A1 (fr) * 1975-05-30 1976-12-24 Munich Bernard Pompe a chaleur pour eau chaude domestique
US4194368A (en) * 1976-10-04 1980-03-25 Borg-Warner Corporation Combination split system air conditioner and compression cycle domestic hot water heating apparatus
US4151721A (en) * 1977-09-09 1979-05-01 Kumm Emerson L Solar powered air conditioning system employing hydroxide water solution
US4173872A (en) * 1978-02-01 1979-11-13 Energy Utilization Systems, Inc. Water heater apparatus
US4330309A (en) * 1979-06-18 1982-05-18 Robinson Jr Glen P Heat pump water heater
WO1981003219A1 (en) * 1980-04-30 1981-11-12 Elektro Standard Device for the recovery of heat
US4316502A (en) * 1980-11-03 1982-02-23 E-Tech, Inc. Helically flighted heat exchanger
US4434539A (en) * 1980-11-03 1984-03-06 E-Tech, Inc. Method of manufacturing a heat exchanger
US4363218A (en) * 1981-04-10 1982-12-14 Halstead Industries, Inc. Heat pump using solar and outdoor air heat sources
US4399664A (en) * 1981-12-07 1983-08-23 The Trane Company Heat pump water heater circuit
US4391104A (en) * 1982-01-15 1983-07-05 The Trane Company Cascade heat pump for heating water and for cooling or heating a comfort zone
US4448037A (en) * 1982-01-29 1984-05-15 Mitsubishi Denki Kabushiki Kaisha Combined air conditioning and hot water service system
US4474018A (en) * 1982-05-06 1984-10-02 Arthur D. Little, Inc. Heat pump system for production of domestic hot water
US4575001A (en) * 1983-10-11 1986-03-11 Cantherm Heating Ltd. Heat pump system
US4685307A (en) * 1984-07-27 1987-08-11 Uhr Corporation Residential heating, cooling and energy management system
US4528822A (en) * 1984-09-07 1985-07-16 American-Standard Inc. Heat pump refrigeration circuit with liquid heating capability
US4598557A (en) * 1985-09-27 1986-07-08 Southern Company Services, Inc. Integrated heat pump water heater
US4665712A (en) * 1985-12-10 1987-05-19 Dec International, Inc. Heat pump water heater system
US4776180A (en) * 1986-05-22 1988-10-11 Mississippi Power Company Updraft integrated heat pump
US4959975A (en) * 1987-05-14 1990-10-02 Conserve, Inc. Heat pump system
US4796437A (en) * 1987-10-23 1989-01-10 James Larry S Multifluid heat pump system
US4856578A (en) * 1988-04-26 1989-08-15 Nepco, Inc. Multi-function self-contained heat pump system
US4893476A (en) * 1988-08-12 1990-01-16 Phenix Heat Pump Systems, Inc. Three function heat pump system with one way receiver
US4911741A (en) * 1988-09-23 1990-03-27 Davis Robert N Natural gas liquefaction process using low level high level and absorption refrigeration cycles
US4955930A (en) * 1989-07-21 1990-09-11 Robinson Jr Glen P Variable water flow control for heat pump water heaters
US4955207A (en) * 1989-09-26 1990-09-11 Mink Clark B Combination hot water heater-refrigeration assembly
US5081848A (en) * 1990-11-07 1992-01-21 Rawlings John P Ground source air conditioning system comprising a conduit array for de-icing a nearby surface

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Hydrotech 2000 brochure Carrier. *
Hydrotech 2000 brochure-Carrier.

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5473907A (en) * 1994-11-22 1995-12-12 Briggs; Floyd Heat pump with supplementary heat
US5806331A (en) * 1995-08-07 1998-09-15 Waterfurnace International, Inc. Water-based hot water heat pump
US5947373A (en) * 1996-02-09 1999-09-07 Sanyo Electric Co., Ltd. Refrigerant circuit with fluid heated refrigerant
US5802864A (en) * 1997-04-01 1998-09-08 Peregrine Industries, Inc. Heat transfer system
US5901563A (en) * 1997-04-01 1999-05-11 Peregrine Industries, Inc. Heat exchanger for heat transfer system
US6253564B1 (en) 1997-04-01 2001-07-03 Peregrine Industries, Inc. Heat transfer system
US5984198A (en) * 1997-06-09 1999-11-16 Lennox Manufacturing Inc. Heat pump apparatus for heating liquid
US6823683B2 (en) * 2000-05-15 2004-11-30 Peugeot Citroen Automobiles Sa Method and apparatus for regulating the temperature of a motor vehicle cabin
US20040089003A1 (en) * 2000-05-15 2004-05-13 Manuel Amaral Temperature control method and device in a motor vehichle passenger compartment
US20060162720A1 (en) * 2005-01-24 2006-07-27 Air Hydronic Product Solutions, Inc. Solar and heat pump powered electric forced hot air hydronic furnace
US7398778B2 (en) 2005-01-24 2008-07-15 Air Hydronic Product Solutions, Inc. Solar and heat pump powered electric forced hot air hydronic furnace
US20070039341A1 (en) * 2005-08-17 2007-02-22 Bradford White Corporation Heat pump water heater
US7866168B2 (en) 2005-08-17 2011-01-11 Bradford White Corporation Heat pump water heater
US7334419B2 (en) * 2005-08-17 2008-02-26 Bradford White Corporation Heat pump water heater
US20080104986A1 (en) * 2005-08-17 2008-05-08 Bradford White Corporation Heat pump water heater
US20070199337A1 (en) * 2006-02-27 2007-08-30 Sanyo Electric Co., Ltd. Refrigeration cycle device
US20070227529A1 (en) * 2006-03-29 2007-10-04 Fafco, Inc. Kit for solar water heating system
US7658082B2 (en) * 2007-02-01 2010-02-09 Cotherm Of America Corporation Heat transfer system and associated methods
US20080184724A1 (en) * 2007-02-01 2008-08-07 Tadeusz Frank Jagusztyn Heat Transfer System and Associated Methods
US20080202125A1 (en) * 2007-02-26 2008-08-28 Unico, Inc. Packaged Small-Duct, High-Velocity Air Conditioner and Heat Pump Apparatus
US8196642B2 (en) 2007-02-26 2012-06-12 Unico, Inc. Packaged small-duct, high-velocity air conditioner and heat pump apparatus
US20080210177A1 (en) * 2007-03-01 2008-09-04 Rheem Manufacturing Company Dual fuel air conditioning circuit-based water heater
US7506616B2 (en) 2007-03-01 2009-03-24 Rheem Manufacturing Company Dual fuel air conditioning circuit-based water heater
US20100242950A1 (en) * 2007-03-05 2010-09-30 Taco, Inc. Solar Heating Systems
US8511296B2 (en) * 2007-03-05 2013-08-20 Taco Inc. Solar heating systems
US20100101506A1 (en) * 2007-03-27 2010-04-29 Syuuji Furui Heat pump type hot water supply apparatus and heating and hot water supply apparatus
US20100126705A1 (en) * 2007-03-30 2010-05-27 Syuuji Furui Heating and hot water supply apparatus
US8385729B2 (en) 2009-09-08 2013-02-26 Rheem Manufacturing Company Heat pump water heater and associated control system
US20130219945A1 (en) * 2010-12-22 2013-08-29 Mitsubishi Electric Corporation Combined hot water supply and air-conditioning device
US9528713B2 (en) * 2010-12-22 2016-12-27 Mitsubishi Electric Corporation Combined hot water supply and air-conditioning device
US20130336642A1 (en) * 2011-03-11 2013-12-19 Carrier Corporation Rooftop unit
US9683748B2 (en) * 2011-03-11 2017-06-20 Carrier Corporation Rooftop hydronic heating unit
US20130186122A1 (en) * 2011-07-25 2013-07-25 David Hamilton Hot Water Heater Pre-Heating Apparatus
US20130025309A1 (en) * 2011-07-27 2013-01-31 Shih-Kun Huang Energy-saving hot water-heating device and system applicable to the same
US9581340B2 (en) 2012-11-16 2017-02-28 Billybob Corporation Domestic hot water delivery system
US9234686B2 (en) 2013-03-15 2016-01-12 Energy Recovery Systems Inc. User control interface for heat transfer system
US9016074B2 (en) 2013-03-15 2015-04-28 Energy Recovery Systems Inc. Energy exchange system and method
US20140260380A1 (en) * 2013-03-15 2014-09-18 Energy Recovery Systems Inc. Compressor control for heat transfer system
US10260775B2 (en) 2013-03-15 2019-04-16 Green Matters Technologies Inc. Retrofit hot water system and method
US9822996B2 (en) 2014-12-01 2017-11-21 David Deng Additive heat unit for HVAC heat pump system
US20190346187A1 (en) * 2018-05-11 2019-11-14 Mitsubishi Electric Us, Inc. System and method for providing supplemental heat to a refrigerant in an air-conditioner
US10941965B2 (en) * 2018-05-11 2021-03-09 Mitsubishi Electric Us, Inc. System and method for providing supplemental heat to a refrigerant in an air-conditioner
WO2022040047A1 (en) * 2020-08-17 2022-02-24 Hunt Utilities Group Llc System and method for hydronic distribution with submersible pumps in an unpressurized tank
US20230136851A1 (en) * 2021-11-03 2023-05-04 Lunar Energy, Inc. Retrofit hot water heat pump

Also Published As

Publication number Publication date
AU667493B2 (en) 1996-03-28
WO1993009386A1 (en) 1993-05-13
JPH07504966A (ja) 1995-06-01
AU3062992A (en) 1993-06-07
EP0609395A1 (en) 1994-08-10
CA2121794A1 (en) 1993-05-13

Similar Documents

Publication Publication Date Title
US5305614A (en) Ancillary heat pump apparatus for producing domestic hot water
US5351502A (en) Combination ancillary heat pump for producing domestic hot h20 with multimodal dehumidification apparatus
US5558273A (en) Two-pipe system for refrigerant isolation
US7398778B2 (en) Solar and heat pump powered electric forced hot air hydronic furnace
Kavanaugh A design method for hybrid ground-source heat pumps
CA2092879A1 (en) Hot water storage tank heat exchanger system
AU2016253585B2 (en) Solar hot water and recovery system
US7575001B2 (en) Solar and heat pump powered electric forced hot air hydronic furnace
EP0824659A1 (en) Heat pump system and method for air-conditioning
US11796222B2 (en) Wall mounted, concealed, water-to-water, water source heat pump with domestic hot water heat exchanger and storage tank
JP3654017B2 (ja) 多機能ヒートポンプシステム
PL181754B1 (pl) Zespól do wytwarzania mocy chlodniczej i grzewczej PL
CN211876138U (zh) 一种多类热力单元蓄能互联系统
US20240044546A1 (en) Water-to-water, water source heat pump with domestic hot water heat priority refrigeration circuit
JP2543776B2 (ja) ヒ―トポンプを用いた暖房・給湯システム
Franseen New Buildings Should Never Operate Cooling Towers and Boilers Simultaneously.
SU1548624A1 (ru) Теплонасосна установка воздушного отоплени , охлаждени и гор чего водоснабжени с рекуперацией и аккумул цией теплоты
Wilson Jr Energy conservation options for residential water heaters
KR100346649B1 (ko) 응축 폐열제거 및 재활용장치
KR200342049Y1 (ko) 가스히트펌프 냉난방기의 배기 응축수를 이용한 난방장치
SU1643880A2 (ru) Тепловой пункт системы теплоснабжени
RU2443944C1 (ru) Система вентиляции и отопления ванных помещений в многоэтажных домах
RU2023959C1 (ru) Тепловой пункт системы теплоснабжения
KR200259092Y1 (ko) 축냉열식 냉,난방장치의 축냉열조
SU1137285A1 (ru) Система солнечного теплоснабжени

Legal Events

Date Code Title Description
FPAY Fee payment

Year of fee payment: 4

AS Assignment

Owner name: LENNOX MANUFACTURING INC., IOWA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LENNOX INDUSTRIES, INC.;REEL/FRAME:008955/0381

Effective date: 19980101

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20020426